Siemens SINUMERIK 840D sl Function Manual page 1040

Z2: NC/PLC interface signals
19.4 Manual and handwheel travel
Overview of signals to channel (to NCK)
DB21, ...
DBX0.3 Activate DRF
Edge evaluation: No
Signal state 1 or The function DRF is selected.
edge change 0 → 1
The function can either be selected directly from the PLC user program or from the operator panel
front via HMI interface signal:
DB21, ... DBX24.3 (DRF selected)
This HMI interface signal is either converted by the basic PLC program or the PLC user program to
interface signal:
DB21, ... DBX0.3 (Activate DRF).
As soon as the function DRF is active, DRF offset can be modified in operating modes
AUTOMATIC or MDA.
Signal state 0 or The function is not selected.
edge change 1 → 0
Signal irrelevant for JOG mode
...
Application The DRF function can be enabled specifically by the PLC user program with the interface signal:
example(s) DB21, ... DBX0.3 (Activate DRF).
Corresponding to .... DB21, ... DBX24.3 (DRF selected)
DB21, ...
DBB12, 16, 20
Bit 0-2 Activate handwheel (1 to 3) for geometry axis (1, 2, 3)
Edge evaluation: No
Signal state 1 or These machine data determine whether this geometry axis is assigned to handwheel 1, 2, 3 or no
edge change 0 → 1 handwheel.
Only one handwheel can be assigned to an axis at any one time.
If several interface signals:
DB21, ... DBX12.1-3, DBX16.1-3, DBX20.1-3 (Activate handwheel)
are set, priority "Handwheel 1" before "Handwheel 2" before "Handwheel 3" applies.
Note:
Three geometry axes can be traversed simultaneously with handwheels 1 to 3!
Signal state 0 or Neither handwheel 1, 2 nor 3 is assigned to this geometry axis.
edge change 1 → 0
Application The PLC user program can use this interface signal to disable the influence of turning the
example(s) handwheel on the geometry axis.
Corresponding to .... DB21, ... DBX40.7 or DBX40.6 ff (Handwheel active for geometry axis)
1040
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions